Date: Mon, 30 Sep 2024 08:41:52 -0700
Hello Everyone,
I hope all are well on your side. We have a 500MHz Oxford 22-year-old
magnet that is leaking LHe. Picture attach. The normal LHe boil-off
is 5 cc/h, and the average loss is 0.43%, about 23 mL/h. LHe fill is
every 90-100 days. It uses about 45-50L the most. We’ve
lost LHe this week 4x higher than normal. You will see bubbles around
the base, by the transfer port, by the little "black" seal. If you
know of anyone who repair magnet, please let me know. In the meantime,
I would appreciate any recommendations on what I should do to minimize the
loss.
Thank you.
*Hla Win*
Organic & NMR Lab Coordinator
Department of Chemistry ( https://chemistry.wwu.edu/ )
Western Washington University
516 High Street, Bellingham WA 98225
winpiah_at_wwu.edu ( winpiah_at_wwu.edu ) | 360-650-2261 ( tel:360-650-2261 )
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(image/jpeg attachment: 500MHz_magnet_leak.jpg)
(image/jpeg attachment: 500MHz_magnet_leak2.jpg)